CN106545022A - Cofferdam island foundation pit structure and method under the conditions of water delivery is not interrupted in canal lining reparation - Google Patents
Cofferdam island foundation pit structure and method under the conditions of water delivery is not interrupted in canal lining reparation Download PDFInfo
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- CN106545022A CN106545022A CN201610914651.0A CN201610914651A CN106545022A CN 106545022 A CN106545022 A CN 106545022A CN 201610914651 A CN201610914651 A CN 201610914651A CN 106545022 A CN106545022 A CN 106545022A
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- cofferdam
- water
- foundation pit
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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Abstract
The invention discloses cofferdam island foundation ditch and method under the conditions of water delivery is not interrupted in canal lining reparation, it is characterised in that：Water flowing channel (1) is included along the liner plate (2) of water delivery direction laying and along the described symmetrically arranged inclined canal slope (3) of liner plate (2)；Cofferdam (4) is provided with water flowing channel (1), described cofferdam (4) is simultaneously fixed together with Qu Po (3) lower end positioned at the middle part of described water flowing channel (1)；The bottom in described cofferdam (4) forms dry foundation pit (5) with the water flowing channel (1), described cofferdam (4) is modular buoyancy tank steel construction, aerofluxuss, discharge structure (4.1) are internally provided with the cofferdam (4) told, it overcomes the cofferdam of the prior art can be to the hurtful shortcoming of channel structure, with the head being greatly reduced in foundation ditch, the advantage of the uplift pressure that foundation ditch inside lining is born is effectively reduced.
Description
Technical field
The present invention relates to Construction for Hydroelectric Project diversion technology field, is more specifically that canal lining is repaired not
Interrupt cofferdam island foundation pit structure and method under the conditions of water delivery.
Background technology
To solve the imbalance of regional water, the water diversion project of China is more and more.It is with the operation of building up of engineering, defeated
Water channel road is affected by many factors such as channel SEA LEVEL VARIATION, drainage system operation conditions, freeze thawing, construction qualities, may be gone out
The damage of the forms such as existing concrete lining plate ftractures, subsides, anti-floating unstability, can cause channel local head to damage to a certain extent
Lose increase, seepage prevention system destruction, it is serious when cause slope instability, have influence on the safe operation of channel.
Channel reparation at present is generally reparation of cutting off the water supply, but for large-sized water transfer project, the south water to north for such as having put into operation
Work centerline, is responsible for Beijing, Tianjin and Hebei, Henan Province's Yan Qu lines large- and-medium size cities resident living and industrial confession
Water task, once supply water interrupting, affects social influence that is wide, causing big.Accordingly, it would be desirable to not interrupt channel hydraulic pipeline condition
Under, foundation ditch is formed using cofferdam, canal lining dry ground repairing construction is carried out under the protection in cofferdam, is continuously supplied to user as far as possible
Water, improves water services quality.
Conventional bank material is generally native stone, concrete, stone-laying, steel sheet pile etc..Concrete, stone-laying cofferdam are difficult under water
Construction；Earth rock cofferdam section is larger, and foundation ditch arrangement relative difficulty is formed in limited canal cross section, and soil erosion may cause
Water delivery inverted-siphon along the line and canal silting, affect channel hydraulic pipeline ability；Steel sheet-pile cofferdam will typically insert weir base certain depth and protect
It is fixed to keep steady, or basic casting concrete, and channel structure can be caused damage.After cofferdam forms foundation ditch, due to canal liner plate and
The drainage blanket connection that impervious barrier bottom is typically provided, keeps at a certain distance away in bed course and is disposed with closed drain, in liner plate
Water penetrative flexible pipe end be provided with the measures such as non-return valve, when the outer channel hydraulic pipeline water level of foundation ditch is higher, foundation ditch inside lining plate bottom
Very high head can be born, uplift pressure destruction occurs.Canal for water conveyance is longer in addition, and position to be repaired is likely distributed in along the line multiple
Different places, reparation need to meet the requirements such as construction is quick, convenient, can be recycled.
The content of the invention
The first object of the present invention is the weak point for overcoming above-mentioned background technology, and in proposing that canal lining is repaired not
Island foundation pit structure in cofferdam under the conditions of disconnected water delivery.
The first object of the present invention is implemented by following scheme：Canal lining reparation is enclosed under the conditions of not interrupting water delivery
Weir island foundation ditch, it is characterised in that：Water flowing channel includes the liner plate and symmetrical along described liner plate along the laying of water delivery direction
The inclined canal slope for arranging；
Cofferdam is provided with water flowing channel, described cofferdam is located at middle part lower end and the Qu Po of described water flowing channel
It is fixed together；
The bottom in described cofferdam forms dry foundation pit with the water flowing channel,
Described cofferdam is modular buoyancy tank steel construction, is internally provided with aerofluxuss, discharge structure in the cofferdam told, in institute
The bottom in the cofferdam stated is provided with valve rubber, and described valve rubber is close on described liner plate；
It is made up of several casings in described cofferdam, by latching connection between each casing, and in adjacent casing
Between be provided with water sealing structure；
Drainage blanket is provided with the bottom of described liner plate and impervious barrier, is equidistantly provided with described drainage blanket
Water tube hose, the end of the Water penetrative flexible pipe described in each are provided with non-return valve, place remove outside described dry foundation pit
Non-return valve on obturator is installed, be mounted on the non-return valve between the edge in described obturator and described cofferdam
Immersible pump.
In above-mentioned technical proposal：Described cofferdam is in " mouth " font structure in canal for water conveyance.
In above-mentioned technical proposal：Described obturator is arranged on the second row of described dry foundation pit periphery or some
On the non-return valve removed on row.
In above-mentioned technical proposal：The drainage blanket arranged between described dry foundation pit and described water flowing channel is protected all the time
Hold connection.
In above-mentioned technical proposal：Described water flowing channel for inverted trapezoidal structure.
In above-mentioned technical proposal：The both sides of described dry foundation pit remain uninterrupted water flowing.
In above-mentioned technical proposal：The non-return valve in cofferdam described in keeping keeps opening-wide state.
In above-mentioned technical proposal：Immersible pump is installed in described dry foundation pit.
The second object of the present invention is to propose that a kind of construction method is under the conditions of canal lining reparation do not interrupt water delivery
The method of cofferdam island foundation ditch.
Second purpose of the invention is by following technical solution implementing：Cofferdam under the conditions of water delivery is not interrupted in canal lining reparation
The method of island foundation ditch, it is characterised in that：Comprise the steps；
1. obturator is installed,：Cofferdam is provided with above the liner plate of described water flowing channel, described cofferdam is with
Dry foundation pit is surrounded between the liner plate at end, described dry foundation pit does not carry out draining in advance, remove dry foundation pit periphery second
Or after some row's non-return valves, then obturator is installed in the hole that non-return valve is stayed removing, described obturator obstruction water flowing
The water stream channel of water and bottom drainage blanket in channel；
2., installing submersible pump：In the range of the obturator obstruction outside dry foundation pit between dry foundation pit border in
Immersible pump is respectively mounted on the aperture of non-return valve；
3., do foundation pit internal drainage to process：The non-return valve in dry foundation pit region described in keeping is opened wide all the time；
4., cofferdam demolition：After the completion of channel is repaired, by cofferdam dismounting for several buoyancy tanks, by tractor tug by buoyancy tank water
Fortune or land transportation of debarking are repaired to next point to be repaired.
In above-mentioned technical proposal：If occurring a large amount of infiltrations in described dry foundation pit, can be in described dry foundation pit peace
Dress immersible pump.
The present invention has following technological merit：1st, cofferdam of the present invention adopts modular buoyancy tank steel construction, is easy to lay in, transports
It is defeated, it is capable of achieving cofferdam and rises and falls in water, is conducive to the underwater construction and dismounting in cofferdam, ditch water flow will not be polluted, and
It is repeatable to utilize, it is cost-effective.
2nd, cofferdam bottom of the present invention sets one layer of valve rubber, prevents which from causing two with central line tunnel concrete lining in south plate directly contact
Secondary destruction, while certain sealing effect is played under steel cofferdam working condition.
3rd, cofferdam of the present invention is arranged as " mouth " type in channel and forms semi-wrapped style foundation ditch, defeated by channel of the beam after narrow
Water, with higher conveyance power of water, the 75%-90% that can reach designed capacity to Middle Line Project For Transferring Water From South To North general main canal conveyance power of water is left
It is right.
4th, the present invention can be greatly reduced the head in foundation ditch, effectively reduce the uplift pressure that foundation ditch inside lining is born, make base
The uplift pressure undertaken by hole inside lining is within the scope of structure can be born, it is to avoid lining cutting occurs uplift pressure destruction.
5th, the present invention solves the channel in the case where water supply conditions are not interrupted and repairs problem, with larger social benefit and economic effect
Benefit.
Description of the drawings
Fig. 1 horizontal layout schematic diagrams of the present invention.
Fig. 2 A-A faces drawings in side sectional elevation of the present invention.
In figure：Water flowing channel 1, liner plate 2, canal slope 3, cofferdam 4, aerofluxuss, discharge structure 4.1, dry foundation pit 5, impervious barrier
6th, drainage blanket 7, Water penetrative flexible pipe 8, non-return valve 9, obturator 10, immersible pump 11.
Specific embodiment
Describe the performance of the present invention below in conjunction with the accompanying drawings in detail, but they do not constitute limitation of the invention, only
It is for example, at the same by illustrate advantages of the present invention will become clearer from it is easy to understand.
Technical research is carried out to one phase of Middle Line Project For Transferring Water From South To North general main canal, the engineering adopts trapezoidal cross-section, tunneling boring is cast-in-place
Concrete lining thickness of slab 8cm-10cm, liner plate bottom adopt impermeable composite geomembrane, and channel drainage system is typically by draining pad
Layer, closed drain (Water penetrative flexible pipe), non-return valve etc. are constituted, the representativeness with long distance water transfer channel.
Cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation of the present invention, it is characterised in that：Water flowing channel 1 is wrapped
Include along the liner plate 2 of water delivery direction laying and along the symmetrically arranged inclined canal slope of described liner plate 23；
Be provided with cofferdam 4 on water flowing channel 1, described cofferdam 4 be located at the middle part lower end of described water flowing channel 1 with
Canal slope 3 is fixed together, (cofferdam 4 is not necessarily in 3 middle of canal slope, just can be with described liner plate 2, while
Ensure that the both sides of the dry foundation pit 5 that lower end is formed continue water flowing, do not stop)；
The bottom in described cofferdam 4 forms dry foundation pit 5 with the water flowing channel 1,
Described cofferdam 4 is modular buoyancy tank steel construction, is internally provided with aerofluxuss, discharge structure in described cofferdam 4
4.1, the bottom in described cofferdam 4 is provided with valve rubber, described valve rubber is close on described liner plate 2；
It is made up of several casings in described cofferdam 4, by latching connection between each casing, and in adjacent casing
Between be provided with water sealing structure；
Drainage blanket 7 is provided with the bottom of described liner plate 2 and impervious barrier 6, is equidistantly installed in described drainage blanket 7
There is Water penetrative flexible pipe 8, the end of the Water penetrative flexible pipe 8 described in each is provided with non-return valve 9, it is peripheral in described dry foundation pit 5
On obturator 10 is installed on the non-return valve 9 removed, it is inverse between the edge in described obturator 10 and described cofferdam 4
Only immersible pump 11 is mounted on valve 9, draw water and discharge on the spot.
Described cofferdam 4 is in " mouth " font structure in canal for water conveyance 1, and the both sides of described dry foundation pit 5 remain
Uninterrupted water flowing.
Described obturator 10 is arranged on having removed on the second row of described 5 periphery of dry foundation pit or some rows
(it is not each row's non-return valve 9 after the dry 5 peripheral second row of foundation pit of dismounting, after simply removing second row on non-return valve 9
A certain row's non-return valve 9, including including second row non-return valve 9).
The drainage blanket 7 arranged between described dry foundation pit 5 and described water flowing channel 1 is remained and is connected；Described
Water flowing channel 1 for inverted trapezoidal structure or rectangular configuration；The non-return valve 9 in cofferdam 4 described in keeping keeps opening-wide state.
The method that cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation of the present invention, it is characterised in that：Including
Following steps；
1. obturator is installed,：The top of the liner plate 2 of described water flowing channel 1 is provided with cofferdam 4, described cofferdam 4
Surround dry foundation pit 5 between liner plate 2, described dry foundation pit 5 does not carry out draining in advance, remove dry 5 periphery of foundation pit the
Two or some row's non-return valves 9 after, then removing in the hole that non-return valve 9 is stayed installation obturator 10, described obturator 10
The water stream channel of water and bottom drainage blanket 7 in obstruction water flowing channel 1；
2., installing submersible pump：In the range of the obstruction of obturator 10 outside dry foundation pit 5 between 5 border of dry foundation pit
Immersible pump 11 is respectively mounted on the aperture of interior non-return valve 9；
3., do foundation pit internal drainage to process：The non-return valve 9 in 5 region of dry foundation pit described in keeping is opened wide all the time；
4., cofferdam demolition：After the completion of channel is repaired, cofferdam 4 is dismantled as several buoyancy tanks, by tractor tug by buoyancy tank water
Fortune or land transportation of debarking are repaired to next point to be repaired.
When occurring a large amount of infiltrations in described dry foundation pit 5, can be in described 5 installing submersible pump 11 of dry foundation pit.
Technical research has been carried out to one phase of Middle Line Project For Transferring Water From South To North general main canal：Simultaneously declare with this patent《One kind is not interrupted
The drainage of foundation pit method that canal lining is repaired dryly under the conditions of water delivery》The analytical calculation of similar operating mode, analytical calculation canal are carried out
The canal dike in road bankets infiltration coefficient for 1 × 10-4Cm/s, it is 1 × 10 that ground is the infiltration coefficient of uniform aquiclude-5Cm/s, canal
Road water level is 7.2m, even if being the situation of 10m in phreatic high, arranges miniature row simultaneously using the technical program in foundation ditch
Pumping for water pump, the uplift pressure that canal liner plate bears in foundation ditch are 0m heads.
Using the technical program, in foundation ditch, water percolating capacity is obviously reduced, the construction of foundation ditch internal drainage and liner plate interfere it is little,
Be conducive to the repairing construction of foundation ditch inside lining plate.Analytical calculation shows the technical program in foundation ditch while arranging micro-drainage pump
Draw water, when level of ground water is 10m, in foundation ditch, water percolating capacity is 4-5m3/d。
Above-mentioned unspecified part is prior art.
Claims (10)
1. cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation, it is characterised in that：Water flowing channel (1) is included along defeated
Water direction laying liner plate (2) and along the described symmetrically arranged inclined canal slope (3) of liner plate (2)；
Be provided with cofferdam (4) on water flowing channel (1), described cofferdam (4) positioned at the middle part of described water flowing channel (1) and under
End is fixed together with canal slope (3)；
The bottom in described cofferdam (4) forms dry foundation pit (5) with the water flowing channel (1),
Described cofferdam (4) is modular buoyancy tank steel construction, is internally provided with aerofluxuss, discharge structure in the cofferdam (4) told
(4.1), the bottom in described cofferdam (4) is provided with valve rubber, and described valve rubber is close on described liner plate (2)；
Be made up of several casings in described cofferdam (4), between each casing by latch connection, and adjacent casing it
Between be provided with water sealing structure；
Drainage blanket (7) is provided with the bottom of described liner plate (2) and impervious barrier (6), it is equidistant in described drainage blanket (7)
Water penetrative flexible pipe (8) is installed, the end of the Water penetrative flexible pipe (8) described in each is provided with non-return valve (9), described dry
Place outside foundation ditch (5) and obturator (10) is installed on the non-return valve (9) removed, enclose with described in described obturator (10)
Immersible pump (11) is mounted on non-return valve (9) between the edge on weir (4).
2. cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation according to claim 1, it is characterised in that：
Described cofferdam (4) is in " mouth " font structure in canal for water conveyance (1).
3. cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation according to claim 1 and 2, and its feature exists
In：Described obturator (10) having removed on the second row of described dry foundation pit (5) periphery or some rows
On non-return valve (9).
4. cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation according to claim 3, it is characterised in that：
The drainage blanket (7) arranged between described dry foundation pit (5) and described water flowing channel (1) is remained and is connected.
5. cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation according to claim 4, it is characterised in that：
Described water flowing channel (1) for inverted trapezoidal structure.
6. cofferdam island foundation ditch under the conditions of water delivery is not interrupted in the canal lining reparation according to claim 4 or 5, and its feature exists
In：The both sides of described dry foundation pit (5) remain uninterrupted water flowing.
7. cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation according to claim 6, it is characterised in that：
The non-return valve (9) in cofferdam (4) described in keeping keeps opening-wide state.
8. cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation according to claim 7, it is characterised in that：
Immersible pump (11) is installed in described dry foundation pit (5).
9. cofferdam island under the conditions of water delivery is not interrupted in the canal lining reparation according to any claim in claim 1-8
The method of foundation ditch, it is characterised in that：Comprise the steps；
1. obturator is installed,：Cofferdam (4) is provided with above the liner plate (2) of described water flowing channel (1), described encloses
Dry foundation pit (5) is surrounded between weir (4) and liner plate (2), described dry foundation pit (5) does not carry out draining in advance, removes dry ground
Behind foundation ditch (5) periphery second or some row's non-return valves (9), then removing installation obturator in the hole that non-return valve (9) is stayed
(10), the water stream channel of the water and bottom drainage blanket (7) in described obturator (10) obstruction water flowing channel (1)；
2., installing submersible pump：In the range of dry foundation pit (5) obturator (10) obstruction outward with dry foundation pit (5) border it
Immersible pump (11) is respectively mounted on the aperture of interior non-return valve (9)；
3., do foundation pit internal drainage to process：The non-return valve (9) in dry foundation pit (5) region described in keeping is opened wide all the time；
4., cofferdam demolition：After the completion of channel is repaired, by cofferdam (4) dismounting for several buoyancy tanks, by tractor tug by buoyancy tank water transport
Or disembarkation land transportation is repaired to next point to be repaired.
10. the method that cofferdam island foundation ditch under the conditions of water delivery is not interrupted in canal lining reparation according to claim 9, which is special
Levy and be：If occurring a large amount of infiltrations in described dry foundation pit (5), can be in described dry foundation pit (5) installing submersible pump (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914651.0A CN106545022B (en) | 2016-10-20 | 2016-10-20 | Cofferdam island foundation pit structure and construction method under the conditions of water delivery are not interrupted in canal lining reparation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914651.0A CN106545022B (en) | 2016-10-20 | 2016-10-20 | Cofferdam island foundation pit structure and construction method under the conditions of water delivery are not interrupted in canal lining reparation |
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| Publication Number | Publication Date |
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| CN106545022A true CN106545022A (en) | 2017-03-29 |
| CN106545022B CN106545022B (en) | 2018-09-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565665A (en) * | 2019-09-18 | 2019-12-13 | 河南省水利勘测设计研究有限公司 | Construction method for repairing channel side slope without water cut based on canopy type cofferdam |
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| US5806252A (en) * | 1995-11-24 | 1998-09-15 | Sibelon S.P.A. | Waterproofing system for hydraulic structures with rigid sheets in synthetic material |
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| CN103967026A (en) * | 2014-04-04 | 2014-08-06 | 河海大学 | Temporary cofferdam applied to maintenance of urban tidal river concrete anti-flood wall and construction method thereof |
| CN104372803A (en) * | 2014-11-10 | 2015-02-25 | 黄河水利职业技术学院 | Combined type movable cofferdam for embankment danger elimination and reinforcement |
| CN104790417A (en) * | 2015-04-17 | 2015-07-22 | 中水北方勘测设计研究有限责任公司 | Spliced chamber cofferdam for repair of canal lining projects |
| CN206143787U (en) * | 2016-10-20 | 2017-05-03 | 长江勘测规划设计研究有限责任公司 | Cofferdam island formula foundation ditch under uninterrupted water delivery condition of canal lining restoration |
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- 2016-10-20 CN CN201610914651.0A patent/CN106545022B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5806252A (en) * | 1995-11-24 | 1998-09-15 | Sibelon S.P.A. | Waterproofing system for hydraulic structures with rigid sheets in synthetic material |
| CN103046514A (en) * | 2013-01-11 | 2013-04-17 | 北京泰宁科创雨水利用技术股份有限公司 | Liner used for ditches |
| CN103967026A (en) * | 2014-04-04 | 2014-08-06 | 河海大学 | Temporary cofferdam applied to maintenance of urban tidal river concrete anti-flood wall and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110565665A (en) * | 2019-09-18 | 2019-12-13 | 河南省水利勘测设计研究有限公司 | Construction method for repairing channel side slope without water cut based on canopy type cofferdam |
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| CN106545022B (en) | 2018-09-14 |
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